Operating device for valve grinders



E. R. JONES.

OPERATING DEVICE FOR VALVE GRINDERS.

APPLICATION FILED MAY 29, I9I9.

Patented July 4, 1922.

Jmueutoz Erwin R Jones;

Human,

stares rarest caries,

ERVIIN It. JONES, OF COLUMBUS, OEIO.

OPERATING DEVICE FOR VALVE GRINDERS.

T 0 all whom 2'25 may concern Be it known that I, ERwiN R. JONES, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Operating Devices for Valve Grinders, of which the following is a specification.

The invention relates broadly to engine tools, and has particular reference to valve grinders, the object of the invention being to provide a valve grinder of simple, efiicient and economical construction which will be fully capable of carrying out its intended functions in a reliable and labor saving manner.

In carrying out the invention, a valve grinder is provided wherein is embodied a casing having a valve rotating stem journaled therein, said stem being provided with a pair of fixed pinions which are disposed to be successively engaged by means of a rotating gear element, whereby upon the rotation of said element said valve stem will be alternately oscillated first in one direction and then in the opposite direction, in order that the necessary abrasive action may be imparted to the valve seat by the ground to effect the removal of carbon or other extraneous deposit therefrom.

Another salient object of the invention resides in providing said valve stem with a co-operative device for imparting friction thereto, said device being of such nature as to retain the valve stem inert and to overcome the momentum thereof during the period of travel of said gear element from one of said pinions to the other, in order that the teeth of said pinions will be maintained in such positions as to readily mesh with the teeth of the gear element, and to thereby avoid the possibility of binding or tooth locking between the gear element and pinions so that the grinder will be constantly maintained in condition for successful operation.

With these and other objects in view, as will appear as the description proceeds, the invention accordingly consists in the novel features of construction, combination of elements and arrangement of parts to be here inafter fully described and wherein the scope thereof is pointed out in the following claims.

In the accompanying drawing, forming a part of this specification, and wherein sim- Spccification of Letters Patent. Pgaigentjgd July 21, 1922 Application filed May 29,

1919. Serial No. 300,777.

ilar characters of reference denote like and corresponding parts Figure 1-is a side elevation of the valve grinding tool comprising the present invention.-

Figure 2 is a front elevation of the tool, the cover plate thereof being omitted in order to disclose the underlying structure, and

Figure 3 is a horizontal sectional view taken along the line 3-3 of Figure 1.

Referring more particularly to the structural details of the invention, the latter in this instance'has been exemplified as comprising a hollow circular or drum like casing 1, preferably formed from cast iron, the bottom of said casing being provided with a tubular boss 2, and the upper portion, diametrically opposite the depending boss 2 is provided with a bearing enlargement '3. A valve rotating shaft 1 is ournaled for rotation with in the casing 1, said shaft having its upper end suitably supported for rotation within the bearing 3 and its lower end likewise journaled within the supporting and guiding boss 2. The lower end of said shaft projects below the boss 2 and is bifurcated as at 5 for the reception of a valve engaging plate 6, a cotter pin 7 being employed to pivotally fasten the plate 6 within the bifurcated portion 'of the valve shaft, said plate as usual being provided with depending lugs 8, which are adapted for engagement with the usual socketed recesses found in the poppet valves of internal combustion engines. In this manner the rotation of the shaft at will impart similar movement to the engine valves,

whereby the latter may be employed in the ordinary manner for effecting the removal of carbon deposit upon its associated seat.

In order to impart the required oscillatory' motion to the shaft 4:, the latter is provided within the casing 1 with a pair of fixed and spaced pinions 9 and 10, these pinions being disposed for meshing engagement with a gear element 11, the latter being also situated within said casing and is preferably mounted for rotation in unison upon a stud shaft 12, which latter is journaled within a tubular bearing 13 projecting from the rear face of the casing. A crank arm let depends rigidly from the outer end of the shaft 12 and the free end of said arm is, in turn, equipped with a knob or handle 15, whereby upon the rotation of the shaft 12 through the medium of said knob and its associated arm 1 1 rotary motion may be imparted to the gear element 1 1. This element is provided with teeth 16 which are of suchnumber as to be simultaneously free from engagement with either one or the other of the pnnons sand 10, so that upon the rotation of the element 11 the teeth 16 thereof will successively engage with said pinions to oscillate the shaft 4; first in one direction and then in the other.

In order to retain the teeth ofthe pinions in such relation asto be capable of engaging Withthe teeth 16 of the element 11 without causing the said teeth to bind, use is made of a spring element 17, which has one end thereof fixed as at 181 tothe removable cover 19 of the casing 1, and the free end 20 of said spring element is disposed to resiliently press upon the shaft at so as to arrest undue a motion on the part of the latter. Thus, when the teeth16 are free from engagement with either of said pinions, the rotation of the ally lightin weight and is thus capable of i being conveniently and simply manipulated.

Again, through the instrumentalityof the spring device 17 the'life of the grinder is considerably prolonged, inasmuch as means have been provided for preventing unnatural binding betweenthe gears of the tool and the liability of fracture, which is always present when such binding occurs, pre-' eluded. I

What I claim is:

1. In a valve,- acasing, a valve rotating shaft journaled in said casing, a pair of spaced pinions carried by said shaft, a gear element capableupon being revolved of. successively meshing with said pinions to alternately oscillatethe shaft first in one direction and then in the other, a removable closure plate for said casing, and a leaf spring having one end thereof fixed to said plate and its opposite or free end disposed to engage with said shaft, whereby said spring will serve to maintain said shaft substantially stationary during thegperiod of repose when the gear element is out of mesh with said pinions. V

2. In a valve grinder, a casing, a valve rotating shaft journaled within saidtcasing, a pair of spaced pinions carried by said shaft, a gearelement capable upon being revolved of successively meshing with said P11110113 to alternately oscillate the shaft first in one direction and then in the other, a removable closure plate for said casing, and friction exercising means carried by said plate and disposed: to engage with said shaft to effect proper meshing relation between the teeth of said pinions and those of said gear element. I

In testimony whereof I aflix my signa ture.

ERWiN R. JONES; 

